1. Does the 4/60 support sync scsi?
2. If so, why is it not turned on?

No, Synchronous SCSI is not supported on the 4/60 under 4.1.1. It *is*
supported on the 4/65. I don't know why specifically; probably either speed
or slightly changed hardware between the 4/60 and 4/65. Upgrade thyself (^:

>Does anyone know any way of turning on synchronous SCSI on a 4/60 under 4.1.1?

You can't. The SCSI driver looks at the CPU type in the i.d. PROM at boot
probe time to decide whether it can enable it or not.